Air compressor



FIG. 1 is a perspective view of an air compressor showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof, where those indicated by broken lines are not claimed;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof, where those indicated by broken lines are not claimed. 

CLAIM The ornamental design for an air compressor, as shown and described. 